USDA zone 5b and warmer. Can be used for cut flower, exhibition or garden. Disease susceptibility: very disease resistant, very blackspot resistant., mildew resistant. Remove spent blooms to encourage re-bloom. Spring Pruning: Remove old canes and dead or diseased wood and cut back canes that cross. In warmer climates, cut back the remaining canes by about one-third. In colder areas, you'll probably find you'll have to prune a little more than that.